1265001632 has 12 divisors (see below), whose sum is σ = 2490472026. Its totient is φ = 632500800.

The previous prime is 1265001629. The next prime is 1265001677. The reversal of 1265001632 is 2361005621.

It can be written as a sum of positive squares in only one way, i.e., 1136768656 + 128232976 = 33716^2 + 11324^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19765619 + ... + 19765682.

Almost surely, 2^1265001632 is an apocalyptic number.

It is an amenable number.

1265001632 is a deficient number, since it is larger than the sum of its proper divisors (1225470394).

1265001632 is an equidigital number, since it uses as much as digits as its factorization.

1265001632 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39531311 (or 39531303 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 26.

The square root of 1265001632 is about 35566.8614302696. The cubic root of 1265001632 is about 1081.5095580019.

The spelling of 1265001632 in words is "one billion, two hundred sixty-five million, one thousand, six hundred thirty-two".